Improvement in metallic cartridge-case



W. G. DODGE.

METALLIC CARTRIDGE CASE.

No 48,536. Patented July 4. 1865.

Inventor:

E NORRIS nzfzns co, mam-um To all whom ztjniayconcrn .2

Be it known that I, WILLIAM Washington City,

' of this specificatiom'in whic -jcomplete, with myimprovemen't applied.in-

3 'terna'lly; Fig. 2, a longitudinal section of-aI I metalliccartridge-cas'e' of the ordinary form,

- plating or' coatingthe metallic case withga metal, or'all'oy ofmetals, .less liable to 'corrode' serve the ration.

struct and use in In makin powder, and lubricant all withinImoreparticularly if' in a hot or moist climate.

.- in the fulminate,i owder,

of metalsij -ways, but theplan whichli prefer is to apply' ofthe most totin the but in thatcaseQifiit-E be intended to make a UNITED *SrArnsPATENT OFFICE;

WM; 0. DO GE, 10F. WAS I GTON, DISTRICT or COLUMBIA.

IMPROVEMENT. m MEI-TA Luc CARTRIDGE-CASE.

specincationjormiggpgrt oful etters lfatentfln. amuse, dated July'4,1865.

G.'Donen,of inthe District ofColu'mbia, have inyented'a new. and usefulImprovement ,in' MetallicCartridge-Gases"; and I do hereby vdeclare'thatthefollowing is a full,.clear, and. exact description thereof,reference being had to the accompanying drawings, making part h- I.Figure lis a side elevation-of a ,cartridge showing my iinprovel'ne'ntapplied, and-Fig; 3 is a side elevation of a metallic caseof anotherform, with a portionbrokenjaway to showtheinterioa The nature of my:invention i consists in or oxidizethan the. case itself, and thus precase and its? contents from deterio -'-To preventtheseevils, I'coat'orplate the metallic case of the cartridge, before filling and othermaterials, with tin or anyother suitable metalor alloy, This maybe donein a variety of the coating material in a molten-"state. 0ne qitviousmethods-of doing this is s eets of metal; firom'which the. -casesare toIbemade,'-previo'us to forming them up,- ydipping the "sheets properlyprepared .inmolten', tie in the usual manner of in v i p I Itlcanalso bedone by immersing the case, afterithasbeen formed, into themolten tin,

{would prefer coatin 'cartridge havlinglthe fulminaieplaced intheannular. rim or flange, as is now usually done, I would prefer thatthe case should be tinned the last thingprevious to forming the flange,which isusuallythe last operation in the con- 'struction of the case,for the. reason that, if

tinned after the flange is formed, there will be danger of filling theflange with. the tin, which would prevent .the' subsequent placing ofthe 'fulminate therein. In what are termed central-fire cartridges, inwhich the fulminate is not placed in the flange, this-objection willnotoccur, and in such the timing or plating may be done after the flangeis formed.

It is obvious that other methods of applyingthe coating or plating tothe case may be used;;and that gold, silver, and othermetals or alloy ofmetals may be used instead oftin, 7

but tin is-preferable,lbr the obvious reason that it is one of the 'mosteflicient, -'.cheap'est, andeasiest applied of an for the purposeintended. It is alsoobvious that in using some kind of metals, such asgold, silver, &c., .for the coating material, it may be successfully andrapidly applied-by thewell-known galvanicf process. I I am awareimprovement by boiling brasscases in a solution of tin in acid, butthecoatingthusiapplied.v was a mere film, and entirely ineflicient .for theaccomplishment of the des red object;

and Ith'erefore do-not claim that.

It is obvious'that the cases may be coated onplated internally'cnlyorboth internally and externally, as circumstances may require; andwherethe'cartridges are intended to be -,kept for any great length oftime, and where they'aretobe used-in moist or 'warm climates,

and externally.

"Having thus 'describedmy invention, what claim-is 1 IA cartridge-casefor small-arms composed of ductile metal and coated or platedinterter'nally, or both internally and externally, with ti-nQor othersuitable metal or alloy-of metals, substantially herein-set forth.

WILLIAM G. DODGE.

.Witnesses:-,.

James Lee,- P. T. DODGE y suitable material that eflt'ort's have"heretofore been made to accomplish Zthe object of my.

g them both internally as and for the purpose] 4

